Ceiling fan



FIG. 1 is a side elevational view of a ceiling fan showing my new design, the adjacent sides being substantially similar in appearance;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is an opposite side elevational view thereof, with the fan blades shown rotated slightly; and

FIG. 4 is a top plan view thereof. 

The ornamental design for a ceiling fan, as shown and described. 